Claude (Anthropic) outage, 10 September 2026
Degraded functionality for Claude Cowork on Windows
- Started
- Resolved
- 14 Sept 2026, 19:14 UTC (after 4 days)
- Impact
- Major
- Affected
- Claude Cowork
Last update from Claude (Anthropic)
This issue has been resolved. Microsoft has released a September 14 Windows update that fixes it: https://support.microsoft.com/en-us/servicing/os/windows-11/2026/09/kb5129195-windows-11-24h2-25h2-security-update
Read the full incident on the official Claude (Anthropic) status page
Is Claude (Anthropic) down now?
This page is the record of one past incident. For the live status, see Is Claude (Anthropic) down right now? - it reads the official status page every 2 minutes.